Abstract
AbstractIn this contribution, the ternary BCN anion systems of high‐entropy ceramics (HEC) are consolidated by hot‐pressing sintering and the impacts of sintering temperature and the content of amorphous BCN addition on microstructural evolution and mechanical performance were evaluated. Results confirmed that high‐entropy, oxide, and BN(C) phases were precipitated for (Ta0.2Nb0.2Zr0.2Hf0.2Ti0.2)(B, C, N) ceramics after sintering at 1900°C. With the decrease of BCN addition, a new phase of MiB2 (Mi representing the metal atoms) occurred. The Vickers hardness, bending strength, elastic modulus, and fracture toughness of the optimized bulk HECs were investigated, obtained at 24.5 ± 2.3 GPa, 522.0 ± 2.6 MPa, 478.9 ± 11.1 GPa, and 5.36 ± 0.56 MPa m1/2, respectively.
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